Purdue News Photo
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Eckhard Groll, a professor of mechanical engineering at Purdue University, demonstrates a prototype portable air conditioning unit that uses carbon dioxide as a refrigerant instead of conventional chemicals. The prototype has been developed as part of research funded by the U.S. Army. Carbon dioxide is a green alternative to conventional refrigerants, which cause about 1,400 times more global warming than the same quantity of carbon dioxide.
(Purdue News Service photo/David Umberger)
The story accompanying this photograph can be seen by clicking this link to Groll.aconference
For more information about photographs, send e-mail to:
David Umberger
Associate Director
Purdue News Service
umberger@purdue.edu
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